Flavour-Conserving CP Phases in Supersymmetry and Implications for Exclusive B Decays

Abstract

We study rare exclusive B decays based on the quark-level transition b->s(d)l^+l^-, where l=e or mu, in the context of supersymmetric theories with minimal flavour violation. We present analytic expressions for various mixing matrices in the presence of new CP-violating phases, and examine their impact on observables involving B and \bar{B} decays. An estimate is obtained for CP-violating asymmetries in B->K^(*)l^+l^- and B->rho(pi)l^+l^- decays for the dilepton invariant mass region 1.2 GeV < M_{l^+l^-}< M_{J/psi}. As a typical result, we find a CP-violating partial width asymmetry of about -6% (-5%) in the case of B->pi (B->rho) in effective supersymmetry with phases of O(1), taking into account the measurement of the inclusive b->s gamma branching fraction. On the other hand, CP asymmetries of less than 1% are predicted in the case of B->K^(*). We argue that it is not sufficient to have additional CP phases of O(1) to observe large CP-violating effects in exclusive b->s(d)l^+l^- decays.

34 pages, REVTeX, 6 figures, final version to appear in Phys. Rev. D, with some minor additions

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• B -> X_s gamma in Supersymmetry with Explicit CP Violation
• Exclusive semileptonic rare decays $B-{>}_{(}$K,K^*) \ell^+ \ell^- in supersymmetric theories
• Exploring flavor structure of supersymmetry breaking from rare B decays and unitarity triangle
• $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ Forward-backward Asymmetry and New Physics
• Effects of Large CP Phases on the Proton Lifetime in Supersymmetric Unification
• Reevaluating Bounds on Flavor-Changing Neutral Current Parameters in R-parity Conserving and R-parity Violating Supersymmetry from B0 - bar(B0) Mixing
• Chargino Contributions in $B\to \varphi K_S$ Asymmetry
• The exclusive $B->(K,K^{\ast }){\ell }^{+}{\ell }^{-}$ decays in a CP softly broken two Higgs doublet model
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• Two-loop gluino corrections to the inclusive $B\to X_{{}_s}\gamma$ decay in CP violating MSSM with large $\tan \beta$
• B -> K pi Puzzle and New Sources of CP Violation in Supersymmetry
• CP-Conserving Unparticle Phase Effects on the Unpolarized and Polarized Direct CP Asymmetry in $b\to d{\ell }^{+}{\ell }^{-}$ Transition
• CP-Violation in b \to s \ell^{+} \ell^{-} transition Beyond the Standard Model
• CP violation in the $B\to K{\ell }^{+}{\ell }^{-}$ decay
• Supersymmetric contributions to ${\bar{B}}_s\to \varphi {\pi }^0$ and ${\bar{B}}_s\to \varphi {\rho }^0$ decays in SCET
• Flavour anomalies in supersymmetric scenarios with non-minimal flavour violation